Adjustment Procedure
Results of Improper Adjustment
1. Set the panel setting value at 0.
2. After adjustments, firmly tighten the screws that have been loos
-
ened.
(Screw tightening should be done under the condition that the
setscrews
❷
is pushed against the horizontal feed bracket shaft
❶
.)
(Cautions)1. In regard to the locus of standard feeding, the
throat plate and the feed dog rise almost horizon-
tally when the throat plate rises.
2. The direction of the horizontal feed bracket shaft
❶
should be adjusted on the right side (operator
side).
3. If there is rattle in the horizontal feed bracket shaft
❶
, this can be a cause of unusual sound and im-
proper linearity.
4. When you have changed the stitch pitch, the feed
dog height, and the feed timing, run the sewing
machine at low speed to make sure that nothing
interferes with each other before the actual sew-
ing (a gap with 0.5 mm or more).
5. There may be the cases where the feed amount of
the operation panel and the actual sewing pitch
are different from each other in case of the use in
the state other than the standard delivery or mate-
rial used. Compensate the pitch in accordance
with the sewing product.
◦ If the gradient of the feed dog is
adjusted for either shaft only, the
feed dog height may be changed.
Adjustments are needed for both
shafts in all cases.
◦ According to the shaft adjusting
position, the position of feed dog
motion may be shifted.
In such a case, loosen the tight-
ening screw
❸
of the horizontal
feed arm
❹
to adjust the position
of motion.
◦ According to the result of feed
dog height or gradient adjust-
ments, there is possibility of inter-
ference with the thread trimmer
unit.
◦ When the feed dog height is
set above the standard level,
the feeding power is improved.
Instead, there can be problems
of presser jumping at high speed
and flaws in light materials.
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